diff --git a/interface/src/Audio.cpp b/interface/src/Audio.cpp
index 97929a99ca..995cb12a7f 100644
--- a/interface/src/Audio.cpp
+++ b/interface/src/Audio.cpp
@@ -116,7 +116,7 @@ int audioCallback (const void* inputBuffer,
         printLog("got output\n");
     }
     
-    if (inputLeft) {
+    if (agentList && inputLeft) {
         
         //  Measure the loudness of the signal from the microphone and store in audio object
         float loudness = 0;